A new study from the Centers for Behavioral and Preventive Medicine at The Miriam Hospital has found that depression, stress and anxiety may predict risky behaviors, including smoking, binge drinking, poor diet, unprotected sex and drug abuse, reports ScienceDaily. The research team also explored whether the relationship went the other way --with unhealthy behaviors triggering mental health problems--but failed to find a connection. The authors suggest that adults who have poor mental health turn to drugs or alcohol, for example, as a means to cope.